td {
    text-align: center;
    border: 1px solid gainsboro;
}
table{
    width: 50%;
    margin: 0 auto;
}
.head{
    border: 1px solid gainsboro;
    background-color: aqua;
}
.page{
    text-align: center;
}
.select{
    margin: 10px auto;
    width: 31%;
    height: 30px;
}
.select input{
    height: 30px;
    width: 200px;
}
.select button{
    height: 30px;
    width: 80px;
}
select{
    text-align: center;
    height: 30px;
    width: 80px;
}
.add{
    width: 50%;
    margin: 5px auto;
    padding-right: 10px;
    display: flex;
    flex-direction: column-reverse;
    align-items: flex-end;
}